我正在尝试使用 ItemLookup 遍历 Amazon Product API 为请求的产品返回的 browsenodes 数组，但我无法弄清楚如何可靠地执行此操作，因为返回的数组始终具有不同数量的级别。
我在这里寻找了其他建议例如 SimpleXML 迭代器的答案，但这不起作用并引发异常，因为它无法被解析为 xml ......
amazon 返回的数组如下所示：
[BrowseNodes] => SimpleXMLElement Object
(
[BrowseNode] => Array
(
[0] => SimpleXMLElement Object
(
[BrowseNodeId] => 172659
[Name] => Televisions
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 1266092011
[Name] => Television & Video
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 493964
[Name] => Categories
[IsCategoryRoot] => 1
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 172282
[Name] => Electronics
)
)
)
)
)
)
)
或者这个例如：
[BrowseNodes] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 3764321
[Name] => Chin Strips
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 702368011
[Name] => Snore Reducing Aids
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 3764271
[Name] => Sleep & Snoring
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 3760941
[Name] => Health Care
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 3760931
[Name] => Products
[IsCategoryRoot] => 1
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 3760901
[Name] => Health & Personal Care
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
我需要以某种方式可靠地循环遍历数组第一级中包含类别和子类别信息的所有项目。
如果数组有更多级别 [1]、[2] 等，则需要跳过这些级别。
我需要的信息总是位于第一层->名称，然后是最后一层->名称，其中 iscategoryroot => 1
但由于深度总是不同的，我根本不知道该怎么做:(
在这种情况下我能做什么？我将如何循环这样的数组？
谢谢 ！:)
编辑：
所以我用 curl 连接到 api，并从中构建一个 simplexml 对象：
/* include stuff */
include("amazon_api_class.php");
include("functions.php");
// create new amazon object
$obj = new AmazonProductAPI();
try
{
$result = $obj->getItemByAsin("B004NPND20,B004VRJ3E2,B000EM91FY,B00004Z2HD,B00004Z2HR,B00004Z2HZ,B00002ND60,B000N54BDO,B000BQKBCK,B0000225IO");
} catch(Exception $e)
{
echo $e->getMessage();
}
// loop over the returned object and extract the details we need
foreach($result->Items->Item as $key => $item){
然后浏览节点数组的完整输出看起来像这样（虽然总是不同）
[BrowseNodes] => SimpleXMLElement Object
(
[BrowseNode] => Array
(
[0] => SimpleXMLElement Object
(
[BrowseNodeId] => 172659
[Name] => Televisions
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 1266092011
[Name] => Television & Video
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 493964
[Name] => Categories
[IsCategoryRoot] => 1
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 172282
[Name] => Electronics
)
)
)
)
)
)
)
[1] => SimpleXMLElement Object
(
[BrowseNodeId] => 13900851
[Name] => Electronics Features
[Children] => SimpleXMLElement Object
(
[BrowseNode] => Array
(
[0] => SimpleXMLElement Object
(
[BrowseNodeId] => 51549011
[Name] => Featured Categories
)
[1] => SimpleXMLElement Object
(
[BrowseNodeId] => 3302711
[Name] => Gold Merchants
)
[2] => SimpleXMLElement Object
(
[BrowseNodeId] => 2354568011
[Name] => Specialty Boutique
)
)
)
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 172282
[Name] => Electronics
)
)
)
[2] => SimpleXMLElement Object
(
[BrowseNodeId] => 1288264011
[Name] => All product
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 1267878011
[Name] => Products
[IsCategoryRoot] => 1
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 1267877011
)
)
)
)
)
[3] => SimpleXMLElement Object
(
[BrowseNodeId] => 3545110011
[Name] => Home Entertainment
[Children] => SimpleXMLElement Object
(
[BrowseNode] => Array
(
[0] => SimpleXMLElement Object
(
[BrowseNodeId] => 3547652011
[Name] => Blu-Ray Players
)
[1] => SimpleXMLElement Object
(
[BrowseNodeId] => 3547650011
[Name] => DVD Players
)
[2] => SimpleXMLElement Object
(
[BrowseNodeId] => 1294446011
[Name] => Televisions
)
)
)
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 1294447011
[Name] => Electronics
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 1267878011
[Name] => Products
[IsCategoryRoot] => 1
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 1267877011
)
)
)
)
)
)
)
[4] => SimpleXMLElement Object
(
[BrowseNodeId] => 1293318011
[Name] => TVs
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 1267879011
[Name] => Special Features
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 1267877011
)
)
)
)
)
[5] => SimpleXMLElement Object
(
[BrowseNodeId] => 1293319011
[Name] => Electronics
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 1267879011
[Name] => Special Features
[Ancestors] => SimpleXMLElement Object
(
[BrowseNode] => SimpleXMLElement Object
(
[BrowseNodeId] => 1267877011
)
)
)
)
)
)
)
)
而且我总是只需要第一个数组键，然后是第一个和最后一个子项